04. Epithelial Tissue Flashcards
Proper epithelium
epithelial cells that form the outer layer of the body and the internal membranes that are continuous with the outside of the body (mucous membranes)
Simple epithelium
Single layers resting on a basement membrane of connective tissue.
Squamous epithelium
simple epithelium where the cells form a flat ?pavement? like surface
Columnar epithelium
Cylindrical cells, form a palisade?like layer.
Stratified epithelium
Several layers of cells where the deep layers are columnar and as surface is approached, cells become more flattened and polygonal
Pseudostratified epithelium
Single layer of cells where the cell nuclei are at irregular levels
Pseudostratified ciliated epithelium
pseudostratified cells with cilia on the exposed surface (respiratory tract)
Epidermis
epithelial tissue that forms the outer surface of the body, skin
Transitional epithelium
tissue consisting of multiple layers of epithelial cells which can contract and expand. These cells, part of the epithelium, are usually found in the urinary tract, especially around the urinary bladder.
Glands
Specialized epithelial cells generally for secretion of substances.
Ectoderm
lines external surfaces (skin), alimentary tract
Endoderm
line respiratory tract, epithelium of alimentary tract.
Goblet cells
in mucous membrane secrete mucin (exocrine cells).
Keratin
a protein which gives waterproofing characteristics to the membrane. (skin)
Non?keratized
no waterproofing properties (mucous membranes)